Catalyst-free synthesis of quinazoline derivatives using low melting sugar–urea–salt mixture as a solvent
作者:Zhan-Hui Zhang、Xiao-Nan Zhang、Li-Ping Mo、Yong-Xiao Li、Fei-Ping Ma
DOI:10.1039/c2gc35258c
日期:——
of maltose–dimethylurea (DMU)–NH4Cl was found to be an inexpensive, non-toxic, easily biodegradable and effective reaction medium in the catalyst-freesynthesis of quinazolinederivatives. This simple and efficient method furnished the corresponding quinazolines in high yields via one-pot three-component reaction of 2-aminoaryl ketones, aldehyde, and ammonium acetate under aerobic oxidation conditions
A new and facile CuCl2·2H2O-catalyzed one-pot three-component synthesis for quinazolines
作者:Syed Muhammad Saad、Khalid Mohammed Khan、Shahnaz Perveen、Wolfgang Voelter、Muhammad Taha
DOI:10.1007/s00706-015-1460-5
日期:2015.11
A new and facile CuCl2 center dot 2H(2)O-catalyzed one-pot three-component synthesis for quinazolines has been developed. A mixture of readily available 2-amino-5-chlorobenzophenones, substituted benzaldehydes, ammonium acetate, and CuCl2 center dot 2H(2)O in ethanol was refluxed altogether to afford the desired products in quantitative yields without any purification requirements. Structures of the products were confirmed by H-1 NMR and EI-MS. A plausible reaction mechanism is also discussed.[GRAPHICS].